Chief of staff

The title chief of staff identifies the leader of a complex organization, institution, or body of persons and it also may identify a principal staff officer (PSO), who is the coordinator of the supporting staff or a primary aide-de-camp to an important individual, such as a president or a senior military officer.

In general, a chief of staff provides a buffer between a chief executive and that executive's direct-reporting team. The chief of staff generally works behind the scenes to solve problems, mediate disputes, and deal with issues before they are brought to the chief executive. Often chiefs of staff act as a confidante and advisor to the chief executive, acting as a sounding board for ideas. Ultimately the actual duties depend on the actual position and the people involved.

The chief of staff in a hospital in the United States or Canada is the primary leader of all divisions and staff, including divisions that have chiefs as well, such as, leadership over chief of surgery, chief of obstetrics, chief of orthopedics, etc. as divisions that each are headed by a leader in that specialty. The chief of staff is inevitably a physician, as opposed to the chief administrator, who is often a non-medical professional.

In general, the positions listed below are not "chiefs of staff" as defined at the top of this page; they are the heads of the various forces/commands and tend to have subordinates that fulfill the "chief of staff" roles.